import java.util.Scanner;

public class Main {
    static class  TreeNode{
        public char val;
        public TreeNode left;
        public TreeNode right;



        public  TreeNode(char val){
            this.val=val;

        }
    }
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String str=in.nextLine();
            TreeNode root=create(str);

        }
       
    }
       public static int i=0;
     public static TreeNode create(String str){
        char ch=str.charAt(i);
          TreeNode root=null;
        if(ch!='#'){
           root=new TreeNode(ch);
            i++;
            root.left=create(str);
            root.right=create(str);
        }else{
            i++;
        }
        return root;


     }
     public void inOrder(TreeNode root){
        if(root==null){
            return;
        }
        inOrder(root.left);
        System.out.print(root.val+" ");
        inOrder(root.right);

     }
}